Added a bunch of features

Assets/Scripts/Monster.cs

@@ -5,19 +5,31 @@ using UnityEngine;
 public class Monster : MonoBehaviour {
 	public int value;
 
+	Rigidbody2D rigidBody;
+
 	void Awake() {
-		StartCoroutine (DestroySelfAfter (30f));
+		rigidBody = GetComponent<Rigidbody2D> ();
+
+		StartCoroutine (ReverseDirectionAfter (2f));
+		StartCoroutine (DestroySelfAfter (4f));
 	}
 
 	void OnMouseOver() {
 		if (Input.GetMouseButtonDown(0)) {
-			//TODO: play death sound
+			GameObject.Find ("SoundController").GetComponent<SoundController> ().PlaySnapShot ();
+			GameObject.Find ("Flash").GetComponent<Flash> ().StartFlash ();
 			PersistentData.score += value;
 			Destroy (gameObject);
 		}
 	}
 
+	IEnumerator ReverseDirectionAfter(float seconds) {
+		yield return new WaitForSeconds (seconds);
+		rigidBody.velocity = new Vector2 (-rigidBody.velocity.x, -rigidBody.velocity.y);
+	}
+
 	IEnumerator DestroySelfAfter(float seconds) {
+		//clean up lost objects
 		yield return new WaitForSeconds (seconds);
 		Destroy (gameObject);
 	}